I currently work as a MAMP-stack developer in a small IT company. I mainly code in CodeIgniter/PHP. But having to touch the database often means I delve into MySQL quite a bit. I can do elaborate queries like joins and sub-queries. Being a full-stack developer means I also have to use front-end technologies like HTML/CSS/JS. I often use these technologies: Bootstrap, Font Awesome, jQuery, SASS, NPM and Gulp.
I also occasionally touch technologies like Angular, React and Ionic depending on the project's requirements.